2 INS:eCUTOR INSClTl^gj MENSTRUUS 



Types, eight males. No. 24954, U. S. Nat. Mtis. ; Anchorage, 

 Alaska (1), June 11, 1921 (J. M. Aldrich) ; Valdez, Alaska 

 (3), June 8, 1921 (J. M. Aldrich); Unalakleet, Alaska (4), 

 June 3, 6, 7, 9, 1921 (S. Hadwen). 



Also females as follows: Anchorage, Alaska, June 10, 16, 

 July 21, 1921 (J. M. Aldrich) ; Valdez, Alaska, June 8, 1921 

 (J. M. Aldrich); Unalakleet, Alaska, June 7, 9, 1921 (S. 

 Hadwen) ; Golovin, Alaska, August 2, 1921 (S. Hadwen) ; 

 Buckland River, Alaska, August 7, 1921 (S. Hadwen) ; 

 Kashunuk, Alaska, July 11, 1921 (S. Hadwen) ; Nome, Alaska, 

 August 21, 24, 25, 1916 (F. Johannsen) ; Katmai, Alaska, 

 July, 1917 (J. S. Hine) ; Teller, Alaska, July 29, 1913 (F. 

 Johannsen) ; Fort St. Michael, Alaska (Army Medical Mu- 

 seum) ; Iditarod, Alaska, August 29, 1918 (Alice Twitchell) ; 

 Innoko, Alaska, July 12, 1917 (A. H. Twitchell) ; Goodnews 

 Bay, Alaska, July 15, 1919 (G. L. Harrington) ; Koyukuk 

 River, Alaska, summer, 1901 (W. J. Peters) ; Virgins Bay, 

 Alaska, June 26, 1899 (T. Kincaid) ; Yakutat, Alaska, June 21, 

 1899 (T. Kincaid) ; Hurricane, Alaska, July 15, 1921 (J. M. 

 Aldrich) ; Healy, Alaska, June 23, 1921 (J. M. Aldrich) ; 

 Camp 327, Alaska Engineering Commission, Alaska, July 12, 

 13, 1921 (J. M. Aldrich) ; Camp 334, Alaska Engineering Com- 

 mission, Alaska, June 21, July 9, 1921 (J. M. Aldrich) ; Fair- 

 banks, Alaska, June 29, July 4, 1921 (J. M. Aldrich). 



Dr. Hadwen obtained larvje from pools in the tundra, but 

 unfortunately preserved only immature specimens, so that the 

 characters cannot be given. 



Aedes prolixus, new species. 



A species of the lazarensis group, as shown by the male 

 hypopygium, but differs from both lazarensis and pionips by 

 having the setas on the outer lobe of side piece distinctly coarser 

 than the general vestiture. Otherwise as in lazarensis. 



The mesonotum is covered with light yellowish scales, a dark 

 brown band in the middle, sometimes divided into two approxi- 

 mate bands, running back nearly to antescutellar space, all as 

 in normal punctor. The abdominal bands are contracted or 



